Display Device Conductive Pattern Electrostatic Discharge Protection
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Solution Overview
Problem
Display devices face challenges in protecting pixels from electrostatic discharge, which can lead to damage and operational failures.
Innovation Solution
A display device design that includes a substrate with a conductive pattern surrounding the pixels, electrically connected to a power source line, providing a discharge path for static electricity and preventing damage from electrostatic discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive pattern is added to protect pixels from electrostatic discharge, then reliability is improved, but device complexity increases
Solution Approach 1:
The conductive pattern is merged with existing pixel electrodes and power source lines to form an integrated electrostatic discharge protection network. The first conductive pattern shares layers with pixel electrodes, and the second conductive pattern connects to power source lines, combining protection functionality with existing structural elements rather than adding completely separate components.
Solution Approach 2:
The conductive patterns serve multiple functions: they act as pixel electrodes for light emission control, power source connections for electrical supply, and electrostatic discharge paths for protection. This multi-functionality reduces the need for separate dedicated protection structures, thereby limiting complexity increase while improving reliability.
2Reliability
If conductive patterns are extended throughout the display area, then electrostatic discharge protection is improved, but manufacturing precision requirements increase
Solution Approach 1:
The conductive protection structure is segmented into multiple patterns distributed across different layers and regions. The first conductive pattern is divided into first and second patterns on different layers, with each pattern covering specific areas. This segmentation allows each segment to be manufactured and aligned independently, reducing overall precision requirements compared to a single continuous pattern.
Solution Approach 2:
The conductive protection is implemented across multiple layers (first conductive pattern on one layer, second conductive pattern on another layer), adding a vertical dimension to the protection structure. This multi-layer approach distributes the precision requirements across different manufacturing planes, making alignment more manageable than requiring a single precise planar pattern.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The conductive pattern effectively discharges static electricity, protecting the pixels from damage and ensuring stable operation by reducing the risk of electrostatic discharge-related failures.
Implementation Method 1
a conductive pattern having a mesh shape and disposed around the pixels to surround the light emitting units... electrically connected to a power source line, providing a discharge path for static electricity
Data Source
AI summary
A display device includes a substrate including a display area and a non-display area; pixels disposed in the display area and including respective light emitting units; a first conductive pattern disposed between the pixels; and a power source line disposed in the non-display area and electrically connected to the first conductive pattern. Each of the light emitting units includes a light emitting element, a first pixel electrode disposed on a first end of the light emitting element, and a second pixel electrode disposed on a second end of the light emitting element. The first conductive pattern and the second pixel electrode are disposed on a same layer.